Process of cutting sheet metal.



A. BENSON. PROCESS 0F CUTTING SHEET METAL.

APPLICATION FILED JAN. 27, 1908. Patented 00L. 20, 1908.

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" A propriate cutting rolls 23 are'shown for eibcting these cutsthroughthe bond sec-- They are provided with iiat sides`24k provided'-with properly'spaced countering performance of this step of the process,l

s, preferablyA employ cutting rolls 2O 20,' the se- -i ries. of cutters21 of which are adapted to form thesl'its through the entire Wldth ofthesheet.` v The cutters are notched'at 22 so that they do not Aoperateupon the bond -sections or zones.

The next step of the' process consists in forming cuts through vthe bondsections connecting alternate slits at'eachside thereof.-

" Thus referring to Fig. 5, it will be seen'that all the slits 16 ofs'litted sections 7 and 8 are united by cuts through bond section 12;that i the slits 17 of sections 8 and 9 are united in'a 'slits 1 6 ofsections 9 and 10 are similarly similar manner through bond section 1 3that united through bond section 14 and so on I- tions.-

- through the Whole sheet, the alternate4 slits counting from the edgelof thesheet being united by cuts through the alternate bonds.

cutters adapted to act on alternate bonds only. By this manner ofslitting- I obtain the benefit in the iirst 'step of the process attending the use of'closely associated knives operating u on the solidsheet and preventing the di c ulty to which I have referred. After theslits- 16 and 17 have been united as t described, they are of coursedouble their original length with the' Width of the bond v sectionadded, and the strands thusforme'd 'are united by the uncut alternatebondscotions. The fabric produced by the'opening ofthe sheet is Shown'atFig. 6.

I' claim 1. The improvement in the process of prev 40.

paring sheet metal for expanding, consisting 11i-first forming alinedslits inlongitudinally .separated sections .of the sheet7 and thenuniting aliningslits of adjacent sections by- `cu-tting the separatingbonds, alternating the cuts both transversely and lengthwise of thesheet.

colpiva'- ting sheet metal preparatory to expanding it,

consisting in'rirst` slitting transverse sections or portions ofthesheet with uniform alined vslits spaced the. widthdesired for thestrand vin the completed article, leaving uncut bond portions betweenthe sections, and then uniting-'the alternate slits o'f adjoiningsections-by cutting the bond portions alternatelyboth transversely andllengthwise of the sheet. g

4. The improvement in the process of slitting sheetA metal preparatoryto expanding it,

consisting in iirst' forming a plurality of series .of alined slits ofuniform `length and spacedapart -to correspond tothe width of thestrands inthe completed article, and

then uniting the alternate slits of adjacent sectionsbycutting throughthe alternate bond port-ions, these cuts being alternated both'transversely" and lengthwise of the I 5. The herein described (processof preparingsheet metal for eXpan ing, consisting in first cutting thesheet to form sections of narrow parallel strips, the se arating slitsbetween the said strips of dilrentsections being'ccextensive and inalinement, and then cutting the bond portion remaining between the saidsections to unite alternatey slits ofadjacent sections, alternating thecuts tr'ansversely and lengthwise, throughout the sheet.

s ANDREWv BENSON.

Witnesses:`

' H; M. MUNDAY,

PEARL' ABRAMS. f

